持久性有机污染物的环境大气被动采样技术

Ambient air passive sampling technology for persistent organic pollutants

当今用于监测环境大气中持久性有机污染物共有5种大气被动采样器(PAS):半透膜仪被动采样器、聚氨酯泡沫碟片被动采样器、XAD-2树脂被动采样器、膜封闭吸收涂料被动采样器包括搅拌棒和硅化人造橡皮棒两种类型,以及最新的XAD-4树脂浸渍的PUF碟片被动采样器.介绍了大气PAS采样技术的基本原理,及采样的关键参数和PAS采样速度(R s)的计算方法.重点论述了世界各国学者关于R s的测定方法和影响R s环境因素的最新研究成果,并指出了今后PAS技术发展需关注的问题.

In this paper, five most popular passive air samplers （PAS） used to collect persistent organic pollutants （POPs） in the air are reviewed. They are semi-permeable membrane PAS, polyurethane foam disk PAS, XAD- 2 resin PAS, membrane-enclosed sorptive coatings P3.S, which includes a stir-bar sampler PAS and a silicone elastomer rod PAS, and sorbent （ XAD-4 resin） impregnated polyurethane foam disk PAS. The basic principle of PAS sampling technique and the calculation method of the sampling rate of PAS （Rs） for POPs, which is a the key parameter in the calculation of the POPs concentration in the air from the amount of POPs sequestered by the PAS, are introduced, with particular emphasis on the measurement of RB and the latest research results of the influence factors on the Rs. Additionally, some important research issues related to the future development of PAS technology are alse indicated.